Vol. 11, Issue 9 (2022)

Author(s):
Disha D Desai and PR Patel

Abstract:
Marigold is the one of the most important commercial flower crops grown all over India as well as in Gujarat. Although the area under marigold is increasing but overall yield with regard to flower and seed production is decreasing. The reasons for low productivity are many but one of the major constraints is due to damage caused by pest and diseases. Recently the foliar pathogen, Alternaria tenuissima, causing leaf spot and flower blight of marigold, has caused severe damage under the South Gujarat region. Out of eight fungicides evaluated against the disease it was concluded that zineb 68 + hexaconazole 4 WP (PDI 24.41% and FBI 25.91%) was found superior in managing the disease followed by tebuconazole 50 + trifloxystrobin 25 WG (PDI 29.26% and FBI 33.60%) and chlorothalonil 75 WP (PDI 31.74% and FBI 37.04%).